"Could you point us to one such instance?"
There was one instance a number of years ago a terrorist seduced a young european woman. He placed a bomb in her carry on luggage that exploded over the Mediterranean killing her and several other passengers. This is the reason you hear all those airport warnings about not allowing others to pack stuff in your bags.
Then there was the incident where the American citizen lawyer used her legal status to smuggle messages from an imprisoned terrorist to his terrorist cell.
Then there was the incident of two women carrying bombs on board aircraft that brought down two Russian aircraft.
No, there is no precedent for such a thing.
Sorry, I see no relation to grandma and grandpa harassment in your examples.